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Canon EF 2x III Extender

Multiplies select telephoto lens's focal-length by 2X

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  • Canon EF 2x III Extender

    With lens cap

  • Canon EF 2x III Extender

    Angled view

  • Canon EF 2x III Extender

    Front

 

Our take on the Canon EF 2x III Extender

by Woody Sherman
Canon

Get some extra versatility from your telephoto L-Series lens with this precision-designed 2.0X extender. Your 300mm lens, for example, will double in reach, with a resulting focal length of 600mm (on full-frame cameras) or 960mm (on APS-C sensor cameras), once this extender has been placed in the light path. And it will only give up two stops of light sensitivity in the process. It's like getting two lenses out of your kit bag when this extender is standing at the ready.

A built-in microcomputer facilitates communication between lens, extender, and camera body, and provides fully integrated exposure and focus control on many Canon lenses. Not all lenses will be fully compatible though, so you should check your manuals and the Canon website to make sure of your lens's compatibility with this extender.

Fluorine coatings on the extender's optical elements will keep soils, smearing and fingerprints to a minimum. And it features rugged dustproof and water-resistant construction.

See Camera Lenses that work with this item See more info on this item

Highlights:

  • increases focal length by 2.0X on select Canon L-series telephoto lenses
    • example: a 300mm prime lens will have its reach doubled to 600mm while only losing two stops of sensitivity
    • multiply your lens's focal length by 2 to see the resulting focal length when this lens is placed in-line on a full frame camera
    • then multiply that result by 1.6 to see your effective focal length on Canon APS-C cameras
  • rugged dustproof and water-resistant construction
  • on-board microcomputer regulates communication between camera, extender, and lens
  • 9 elements in 5 groups
  • only compatible with select L-Series lenses; not all automatic functions will be accessible on all lenses, consult manuals and Canon's website for compatibility info
  • 2-7/8" (diameter) x 2-5/8" (length)
  • 11.5 ounces
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
General
Brand Compatibility
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Canon
Image Stabilization
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No
Focal Length
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2x Extender
Maximum Aperture
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N/A
Weight
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11.5 ounces
Parts Warranty
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1 Year
Labor Warranty
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1 Year
Product Research
What's in the box?

Download owner's manual

  • Extender EF2x III lens adapter
  • Front body cover (installed)
  • Rear lens cap (installed)
  • Lens Case LP811
  • Quick Guide
  • Warranty Card

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features

Overview: The Canon Extender 2x III will extend the focal length of a lens by a factor or 2x. It has a standard Canon EF-mount, and is compatible with many L-series Canon EF lenses (see list below). It features 9 elements in 5 groups, and comes with a soft LP811 lens case.

Compatibility: The Extender 2x III is compatible with the following Canon lenses:

Compatible Lens Focal Length and Maximum Aperture
with EF2x III
EF135mm f/2L USM 270mm f/4
EF180mm f/3.5L Macro USM 360mm f/6.7
EF200mm f/2.8L USM 400mm f/5.6
EF200mm f/2.8L II USM 400mm f/5.6
EF200mm f/1.8L USM 400mm f/3.5
EF200mm f/2L IS USM 400mm f/4
EF300mm f/4L USM 600mm f/8
EF300mm f/4L IS USM 600mm f/8
EF300mm f/2.8L USM 600mm f/5.6
EF300mm f/2.8L IS USM 600mm f/5/6
EF400mm f/5.6L USM 800mm f/11
EF400mm f/4 DO IS USM 800mm f/8
EF400mm f/2.8L USM 800mm f/5.6
EF400mm f/2.8L II USM 800mm f/5.6
EF400mm f/2.8L IS USM 800mm f/5.6
EF500mm f/4.5L USM 1000mm f/9.5
EF500mm f/4.5L IS USM 1000mm f/8
EF600mm f/4L USM 1200mm f/8
EF600mm f/4L IS USM 1200mm f/8
EF800mm f/5.6L IS USM 1600mm f/11
EF100-400mm f/4.5-5.6L IS USM 200-800mm f/9.5-11
EF70-200mm f/4L USM 140-400mm f/8
EF70-200mm f/4L IS USM 140-400mm f/8
EF70-200mm f/2.8L USM 140-400mm f/5.6
EF70-200mm f/2.8L IS USM 140-400mm f/5.6
EF70-200mm f/2.8L IS II USM 140-400mm f/5.6
EF300mm f/2.8L IS II USM 600mm f/5.6
EF400mm f/2.8L IS II USM 800mm f/5.6
EF500mm f/4L IS II USM 1000mm f/8
EF600mm f/4L IS II USM 1200mm f/8
EF1200mm f/5.6L USM 2400mm f/11
 
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Canon EF 2x III Extender Reviews

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5 out of 5

CANON 2X EXTENDER

Written By JUNIOR, MUEFREESBORO, TN. on Saturday, March 15, 2014
 
GREAT PRODUCT; CANON HAS DONE A GOOD JOB WITH THE QUALITY
Pros:
ALL GOOD
Cons:
NONE
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